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dumbass
Joined: 02 Jan 2009
Posts: 12
Location: Philippines
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 Posted: Thu Jan 22, 2009 3:51 am Post subject: Q9550 keeps changing from 2666 to 2000Mhz |
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When I check in CPU-Z my core speed keeps changing from 2667Mhz x8 multiplier to 2000Mhz x6 multiplier. Is this how it really works? This is my 1st time having this kind of core processor and I really want to know anything about it? Is the system running correctly or do I have to change any value like the FSB in the BIOS menu? My motherboard is XFX nForce 780i 3-Way SLI
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Thu Jan 22, 2009 4:17 am Post subject: |
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the Q5550 when under load should be running at 2833MHz (x 8.5) so you might be testing it while its not under full load.
The guys here should be able to tell you what program to run while testing to make sure its under full load. 
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andamus
Joined: 06 Dec 2004
Posts: 1029
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| Posted: Thu Jan 22, 2009 5:10 am Post subject: |
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| try to run Orthos and cpu-z together, and you'll see your cpu runnig at full speed. |
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Cobracon
Joined: 28 Aug 2007
Posts: 216
Location: Roosterpoot, MS; US of A (Obama country!)
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| Posted: Thu Jan 22, 2009 5:18 am Post subject: |
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You can also download and run CPUID and it will display your CPU speed at it's highest speed/multiplier (as set in BIOS) without placing a load on your processor:
http://crystalmark.info/software/CrystalCPUID/index-e.html
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Thandor
Joined: 06 Oct 2008
Posts: 461
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| Posted: Thu Jan 22, 2009 5:56 am Post subject: |
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Your CPU has EIST/C1E. EIST stands Enhanced Intel Speedstep Technology and C1E is some kind of halt-state (which decreases energy consumption, Google for C1E or C1 halt states).
What EIST does is lowering the multiplier (6x333=2000MHz) if your CPU isn't doing anything and rise up the multiplier (8,5x333=2833MHz). Along with C1E this also results in a lower vCore and thus lower energy consumption. These techniques are in use on laptops for quite a while. After a while they moved to the desktop as well (AMD Athlon64 with Cool 'n Quiet, Intel Pentium 6xx with EIST).
Because your CPU is running at 2666MHz you are using at multiplier of 8x (8x333=2666MHz). Set your multiplier to either 8,5x or 'Auto' and it will run like it should  .
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And the rest of us would be carousing the aisles, stuffing baloney. |
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Wizzard1
Joined: 05 Nov 2006
Posts: 930
Location: Boston MA USA
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| Posted: Thu Jan 22, 2009 8:41 am Post subject: |
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| So many people questioning Speedstep!! |
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dumbass
Joined: 02 Jan 2009
Posts: 12
Location: Philippines
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| Posted: Thu Jan 22, 2009 10:30 am Post subject: |
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So theres nothing wrong with my system, my rig is running fine right? And I dont have to change anything in the BIOS set up to get the 2.8Ghz
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Thandor
Joined: 06 Oct 2008
Posts: 461
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| Posted: Thu Jan 22, 2009 10:36 am Post subject: |
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| Thandor wrote: | | Because your CPU is running at 2666MHz you are using at multiplier of 8x (8x333=2666MHz). Set your multiplier to either 8,5x or 'Auto' and it will run like it should . |
Meaning: your CPU has to run at 2833MHz when it is doing heavy duty calculations. At the moment your CPU 'only' does 2666MHz which is 166MHz less then it should. As your CPU has a FSB of 333MHz (QDR1333) your multiplier is 0,5x too low.
In case you've lost it here:
The FSB is the frequency the motherboard runs on. The CPU has a multiplier which sets the clockfrequency of the CPU based on the clockfrequency of the FSB. So FSB * Multiplier = CPU Clockfrequency .
At the moment you are running 8x333 = 2666MHz but it should be running at 8,5x333 = 2833MHz. To correct this you have to change the multiplier from 8x to 8,5x in the BIOS. If you don't have the 8,5x as option you can try setting the multiplier on 'auto'.
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dumbass
Joined: 02 Jan 2009
Posts: 12
Location: Philippines
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| Posted: Thu Jan 22, 2009 11:03 am Post subject: |
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Thanks for the advice. Im goin to change the multiplier
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Moto
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| Posted: Wed Feb 11, 2009 3:56 pm Post subject: |
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| You have to turn of Speedstep which automatically adjust multiplier to reduce cpu load when the system is idle. I beleive one of the posts above stated C1E that must be disabled... |
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Bonsai Bill
Joined: 13 Mar 2008
Posts: 32
Location: Vancouver Is., Canada
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| Posted: Wed Feb 11, 2009 7:19 pm Post subject: |
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My advice would be don't mess with the EIST/C1E unless you're trying to stablize an overclock.
I mean....it is there for a reason.
Why waste CPU cycles and power unless you're going to use them for a purpose.
But then again.....maybe you are. |
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